30).Sample of Program To Swap Two Numbers Without Using Temp Variable.

#include<conio.h>
#include<iostream.h>

void main()
{
   clrscr();
   int num1,num2;
   cout<<"\nEnter Two Numbers" ;
   cin>>num1>>num2;
   cout<<"\nThe value of num1 and num2  is " <<"num1= "  <<num1
   <<" num2= "<<num2;

   num1=num1+num2;
   num2=num1-num2;
   num1=num1-num2;
   cout<<"\nNow The value of num1 and num2 is " <<"num1= " <<num1
   <<" num2= "<<num2;

}